Padstow Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.3
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
91.6 mg/L
Est. Daily Cost
A$0.17
energy & soap waste
Source: BOM National Performance Report & ADWG · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Padstow, your appliances are currently losing 7% efficiency due to mineral buildup.
| Appliance | In Padstow | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.9 yrs | 8.5 yrs | -7% |
| Washing Machine | 11.7 yrs | 12 yrs | -3% |
| Water Heater | 13.5 yrs | 15 yrs | -10% |
Regional Water Comparison
How Padstow compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Padstow, New South Wales | 52.5 mg/L | 🟢 Soft | reservoir |
| Revesby, New South Wales | 43.5 mg/L | 🟢 Soft | reservoir |
| Riverwood, New South Wales | 52.5 mg/L | 🟢 Soft | reservoir |
| Peakhurst, New South Wales | 52.5 mg/L | 🟢 Soft | reservoir |
| Punchbowl, New South Wales | 199.5 mg/L | 🔴 Very Hard | reservoir |
National Benchmark
How Padstow compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Padstow | 52.5 mg/L | 🟢 None |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Padstow's Water Unique?
Local geology and source profile
Padstow's drinking water is supplied by Sydney Water, treated at the Prospect Water Filtration Plant drawing predominantly from Warragamba Dam (Nepean River system) for the Canterbury-Bankstown LGA southern Sydney distribution in New South Wales. Water hardness in Padstow is measured at 52.5 mg/L — classified as slightly hard — far below the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Padstow — a family-oriented residential suburb in the southern Canterbury-Bankstown LGA adjacent to the East Hills rail line, known for the Padstow shopping precinct on Howard Road, the Georges River National Park bushland margins, and the mixed residential and light industrial character of this outer southern Sydney community — receives predominantly soft supply in striking contrast to the hard Yagoona (168 mg/L) in the same Canterbury-Bankstown LGA, confirming dramatic supply blend variation across this large LGA.
Padstow's soft supply reflects a predominantly Warragamba Dam contribution with minimal Hawkesbury-Nepean blending at this southern Canterbury-Bankstown Prospect distribution sub-zone. Warragamba Dam collects rainfall from the Blue Mountains sandstone plateau and Kanangra–Boyd granite uplands — chemically resistant terrain contributing negligible dissolved minerals — producing near-soft supply at 52.5 mg/L and TDS 91.6 mg/L. The southern Canterbury-Bankstown sub-zones (Padstow, Revesby 43.5 mg/L) receive a proportionally high Warragamba fraction through supply routing distinct from the harder northern sub-zones.
Padstow residents enjoy low to moderate limescale accumulation on taps and in kettles — descaling every two to three months is typically adequate. Hot water systems accumulate minimal scale. The very low lead reading (0.002 mg/L) is excellent. Sydney Water provides water quality information at sydneywater.com.au, with all ADWG health standards consistently met. Padstow's outer southern Sydney residential community and the Georges River bushland parkland margins benefit from this soft, clean supply.
Geology & Source: Supplied by Sydney Water via the Prospect Water Filtration Plant drawing predominantly from Warragamba Dam — the Padstow Canterbury-Bankstown LGA southern supply carries slightly hard water at 52.5 mg/L with low TDS of 91.6 mg/L, reflecting a predominantly Warragamba-dominant supply with minimal Hawkesbury-Nepean component, in stark contrast to the hard Yagoona (168 mg/L) in the same Canterbury-Bankstown LGA.